| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Machine tools | |
| #3 | Electrical machinery and energy | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Domestic washing | |
| #2 | Grinding or polishing devices | |
| #3 | Woodworking tools | |
| #4 | Dynamo-electric machines | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Petersen William L | 6 |
| #2 | Atkin Kenneth C | 5 |
| #3 | Witt Clausen De | 1 |
| #4 | Hentschel William H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2666498A | Suction cleaner | |
| US2703152A | Suction cleaner | |
| US2639564A | Oscillating sander | |
| US2722700A | Floor treating machine | |
| US2640211A | Rug scrubbing machine | |
| US2624896A | Rug scrubbing machine | |
| US2478074A | Sanding machine | |
| US2497791A | Sanding machine | |
| US2626412A | Rug scrubbing machine | |
| US2546846A | Motor-driven tool | |
| US2540510A | Rotary floor polisher | |
| US1964947A | Hand scraper | |
| CA476053A | Motor driven tools |